The Collaborative International Dictionary of English v.0.48:
Menyanthes \Menyanthes\ prop. n. The type genus of the Menyanthaceae, having only one species: the bogbeans. Syn: genus Menyanthes. [WordNet 1.5]WordNet (r) 3.0 (2006):
Menyanthes n 1: the type genus of the Menyanthaceae; one species: bogbeans [syn: Menyanthes, genus Menyanthes]